Omni-directional treadmill



FIG. 1 is a front perspective view of an omni-directional treadmill showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a rear perspective view thereof.

The broken lines depict portions of the omni-directional treadmill in which the design is embodied that form no part of the claimed design. 

CLAIM The ornamental design for an omni-directional treadmill, as shown and described. 